I do not know the other teachers who do not teach IB or MYP classes, but if one serious about their education, they take IB courses. Now IB teachers are the best. They have the students to interact with their classmates and have us do a lot group work. This good for in the real world, you be working with others. In addition, they are very knowledgeable on what they are teaching and have everything prepared and plan put. All the IB teachers also come together and work out lesson plans and work together to spread out workload for the students. This to prevent assignments to be due on the same day for all the teachers.